DM-100 (52mm) display with display module and Boost sensor module.
Basically it's an OLED screen that's set in a traditional 52mm gauge housing. They're very clear and very accurate.
Each gauge can be connected to multiple sensor modules. For example, you could add an oil pressure SM to this gauge and it would display both without cluttering the dashboard.
Obviously they're fully customisable - just plug your computer into it and you can edit anything you like. Gauge styles, units, range, backgrounds, colours etc.
More info at www.plxdevices.com
Looking for around £200 delivered
Offers welcome.